FoD: Implement timeout for download commands

[kadraman]

If data for any FoD download commands has not been processed (e.g. scans or reports) a HTTP 202 code is returned.
Currently we are waiting forever for a successful HTTP 202 code:

        while ( status==202 ) {
            status = request
                .asFile(file, StandardCopyOption.REPLACE_EXISTING)
                .getStatus();
            if ( status==202 ) { Thread.sleep(30000L); }
        }

We should introduce a timeout for any commands which use this approach.